Granted Patent
Utility
US 5,826,573 · App. 08/856,130
Gas flow control element
Inventors:
Holger Stegmann, Eckhard Riggert
Patented Case
View Patent ↗
Granted: Oct 27, 1998
Filed: May 14, 1997
Inventors
Holger Stegmann
Eckhard Riggert
Assignee (at issue)
DRAGERWERK AKTIEGESELLSCHAFT
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.